"It's nothing," tweeted Musk. "In a few years, this robot will move so fast that you will need light to see it ... Sweet Dreams ..."

He followed up the response using this comment:''We need to regulate AI/robotics as we do with food, drugs, planes and cars, public risks require public control, the release of the FAA will not fly safer, they are for a good reason. "

Musk has already warned of a threat of possible robots that would develop beyond the possibilities of humanity to control them. His views are shared by visionaries like Stephen Hawking and Bill Gates.